5 results about "Metal absorption" patented technology

According to exemplary embodiments of the present invention, provided are a hydrogen purification system and a method for purifying hydrogen, the hydrogen purification system comprising: a first reactor configured to produce a metal nitride and a hydrogen-rich gas by reacting a mixed gas containing hydrogen and nitrogen with a metal absorbent; and a second reactor configured to receive the metal nitride from the first reactor and regenerate same into the metal absorbent, wherein the pressure of the first reactor is 1-5 bar.

This invention belongs to the field of agricultural nanomaterials and heavy metal pollution remediation technology, specifically relating to a zinc-doped carbon quantum dot (Zn-CDs) from orange peel and its application in alleviating abiotic stress in honeysuckle berries. The Zn-CDs are prepared by hydrothermal synthesis using orange peel powder and zinc chloride as raw materials. This invention also discloses the application of these Zn-CDs in alleviating abiotic stress in honeysuckle berries. Applied to honeysuckle berry plants under salt and / or cadmium stress via foliar spraying, it significantly alleviates cadmium and salt stress by reducing heavy metal absorption, activating the antioxidant system, improving photosynthetic efficiency, and regulating hormone and signaling pathway genes, thereby restoring plant growth. This provides a green nano-resistance agent for the safe production of honeysuckle berries in heavy metal / salt-affected areas, while simultaneously realizing the resource utilization of orange peel.

The present application relates to the technical field of organic fertilizer, and discloses a preparation method of a multifunctional organic fertilizer for straw carbonization and heavy metal passivation, which comprises the following components: in-situ phosphorus-calcium doped biochar, plant-derived organic material, composite functional bacterial agent and wood ash, wherein the in-situ phosphorus-calcium doped biochar is prepared by co-pyrolysis of crop straw and animal aggregate. The method forms a stable structure for fixing phosphorus and calcium nutrients and passivation functional sites in the form of chemical bonding and physical coating in the biochar matrix through in-situ co-pyrolysis. The fertilizer prepared by the present application has the functions of long-acting passivation of soil heavy metals and sustained release of nutrients, can realize multiple effects of reducing crop heavy metal absorption, promoting crop growth and improving soil microbial activity, and the fertilizer particles have high compressive strength and water dispersion stability, which are suitable for mechanized application.

The invention provides a preparation method of a high-temperature stealth coating based on ferromagnetic metal / phosphate interface optimization, and belongs to the technical field of functional coating preparation. In order to solve the problems of out-of-control interface reaction and uncontrollable porosity in the preparation process of an existing ferromagnetic metal / phosphate composite coating, the preparation method comprises the steps that S1, a metal substrate is pretreated, and the metal substrate with the clean surface and active sites is obtained; s2, mixing and stirring a phosphate adhesive, aggregate, a curing agent, a ferromagnetic metal absorbent and the modified aqueous solution according to a preset mass fraction to prepare a coating; s3, the surface of the pretreated metal substrate is coated with the paint, and the metal substrate is transferred into a drying oven to be slowly heated and cured; and S4, after the coating is cured, the metal substrate is transferred into a muffle furnace protected by inert atmosphere for high-temperature curing, and the high-temperature stealth coating is obtained on the surface of the metal substrate after natural cooling.

The application discloses a tungsten trioxide coated magnetic metal absorber and a preparation method and application thereof, and relates to the technical field of multi-spectrum compatible stealth materials. The method comprises the following steps: uniformly dispersing tungsten salt and a magnetic metal absorber in an aqueous solvent to obtain a dispersion liquid; heating the dispersion liquid in a water bath to 60-90 DEG C, adjusting the pH of the dispersion liquid to 1-3, and performing a reaction to obtain a pre-product; and treating the pre-product at 400-600 DEG C for 1-2 hours to obtain the tungsten trioxide coated magnetic metal absorber. The prepared absorber is powered, the tungsten trioxide coated on the outer layer is changed from colorless to blue, and the effect of compatible sky blue visible light stealth and radar stealth is realized.